package com.ly.controller;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import org.hibernate.validator.constraints.URL;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.util.StringUtils;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PatchMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.PutMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestHeader;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import com.ly.pojo.Result;
import com.ly.pojo.User;
import com.ly.service.UserService;
import com.ly.utils.JwtUtil;
import com.ly.utils.Md5Util;
import com.ly.utils.ThreadLocalUtil;

import jakarta.validation.constraints.Pattern;

@RestController
@RequestMapping("/user")
@Validated
public class UserController {

    @Autowired
    private UserService userService;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @PostMapping("/register")
    @CrossOrigin(origins = "http://127.0.0.1:8848")
    public Result register(@Pattern(regexp = "^\\S{5,16}") String username,
            @Pattern(regexp = "^\\S{5,16}") String password) {

        // 查询用户
        User u = userService.findByUserName(username);
        if (u == null) {
            // 没有占用
            // 注册
            userService.register(username, password);
            return Result.success();
        } else {
            // 占用
            return Result.error("用户名已被占用");
        }
    }

    @PostMapping("/login")
    public Result<String> login(@Pattern(regexp = "^\\S{5,16}") String username,
    @Pattern(regexp = "^\\S{5,16}") String password){
        // 根据用户名查询用户
        User loginUser = userService.findByUserName(username);
        // 判断用户是否存在
        if (loginUser == null) {
            return Result.error("用户名错误");
        }
        // 判断密码是否正确
        if(Md5Util.getMD5String(password).equals(loginUser.getPassword())){
            // 登录成功
            Map<String,Object> claims = new HashMap<>();
            claims.put("id", loginUser.getId());
            claims.put("username", loginUser.getUsername());
            String token = JwtUtil.genToken(claims);

            //往redis中存储一个键值对  StringRedisTemplate
            ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();

            operations.set(token,token,1,TimeUnit.HOURS);


            return Result.success(token);
        }
        return Result.error("密码错误");
    }
    
    @GetMapping("/userinfo")
    public Result<User> userinfo(@RequestHeader(name = "Authorization") String token){
        // Map<String ,Object> map =  JwtUtil.parseToken(token);
        // String username = (String) map.get("username");
        Map<String ,Object> map = ThreadLocalUtil.get();
        String username = (String) map.get("username");
         // 根据用户名查询用户
         User user = userService.findByUserName(username);
         return Result.success(user);
    }

    @PutMapping("/update")
    @CrossOrigin(origins = "http://127.0.0.1:8848")
    public Result update(@RequestBody @Validated User user){
        userService.update(user);
        return Result.success();
    }

    @PatchMapping("/updateAvatar")
    public Result updateAvatar(@RequestParam @URL String avatarUrl){
        userService.updateAvatar(avatarUrl);
        return Result.success();
    }

    @PatchMapping("/updatePwd")
    public Result updatePwd(@RequestBody Map<String,String> params,@RequestHeader("Authorization") String token){
        // 校验参数
        String oldPwd = params.get("old_pwd");
        String newPwd = params.get("new_pwd");
        String rePwd = params.get("re_pwd");

        if(!StringUtils.hasLength(oldPwd) || !StringUtils.hasLength(newPwd) || !StringUtils.hasLength(rePwd)){
            return Result.error("缺少必要参数");
        }
        // 更新密码
        Map<String,Object> map = ThreadLocalUtil.get();
        String username = (String)map.get("username");
        User LoginUser = userService.findByUserName(username);
        if(!LoginUser.getPassword().equals(Md5Util.getMD5String(oldPwd))){
            return Result.error("密码不正确");
        }
        if(!rePwd.equals(newPwd)){
            return Result.error("两次填写的密码不一样");
        }
        userService.updatePwd(newPwd);

        ValueOperations<String, String> operations = stringRedisTemplate.opsForValue();
        operations.getOperations().delete(token);

        return Result.success();
    }
}
